Core compound.



UNITED STATES PATENT OFFICE.

RALPH DITTY, OF CLEVELAND, OHIO, ASSIGNOR TO BUCKEYE MILLING CO;, OFCLEVELAND, OHIO, A CORPORATION.

(DORE COMPOUND.

Specification of Letters Patent.

Patented Nov. '7, 1905.

To all whom it may concern):

Be it known that I, RALPH DITTY, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented new and useful Improvements in Core Compounds, of which thefollowing is a specification' This invention is an improved compound tobe used for making cores in molding, and it is composed of a mixture ofthe following materials in substantially the proportions stated:

To make a ton of the compound, I use one thousand and fifty pounds ofwheat-flour, six hundred pounds of ground gypsum, one hundred andtwenty-five pounds of fine sawdust, two hundred pounds of common salt,and twenty five pounds of dextrine; total, two thousand pounds.Marble-dust may be substituted for the gypsum, if desired. Thesematerials are thoroughly mixed in a dry powdered state, and theresulting compound will be found to make an excellent product for thepurpose stated. The proportions may be varied without departing from thespirit of the invention, and equivalents may be used, if desired, forthe various materials.

The binding qualities of this mixture are far superior to pure flour andto other com pounds which have been brought to my attention. Thefunction of the materials added to the flour is as follows: The sawdustis put in to make the cores open, so as to allow the gases generatedwhen the metal is poured to escape freely. The dextrine andsalt addbinding qualities, and the latter also forms a hard crust on the outsideof the cores. The gypsum or marble-dust is put in simply as a cheapfiller.

What I claim as new, and desire to secure by Letters Patent, is

A core composition consisting of flour, gypsum, sawdust, salt, anddextrine, in substan tially the proportions stated.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

RALPH DITTY.

Witnesses:

JOHN A. BOMMI-IARDT, LOTTIE NEWBURN.

